1. The problem statement, all variables and given/known data Brad tosses a rock straight up at 33.4 m/s. What is the rock's velocity after 2.1 seconds? 2. Relevant equations V=Vo+at X=Xo+Vot+1/2at^2 V^2=Vo2+2a(X-Xo) 3. The attempt at a solution I used the first equation. V=33.4m/s+9.8(2.1) 9.8 being the acceleration due to gravity. The hint says 'Final velocity equals the initial velocity plus the product of acceleration due to gravity (g) multiplied by the time.' I kept getting the incorrect answer of 54m/s.